Coffee Mug Cake
Prep Time: 10 min
Cook Time: 1 min
Ingredients
- ✓ 1 tablespoon butter, softened
- ✓ 2 tablespoons white sugar
- ✓ ½ beaten egg
- ✓ 2 tablespoons sour cream
- ✓ 2 drops vanilla extract, or more to taste
- ✓ ¼ cup all-purpose flour
- ✓ ⅛ teaspoon baking powder
- ✓ 2 tablespoons all-purpose flour
- ✓ 1 tablespoon brown sugar
- ✓ 1 teaspoon cinnamon
- ✓ 1 tablespoon butter